therm (US)
therm standard definitionUS therm = 100 000 BTU_IT = 1.05505585262e8 J (rulebook C.4), derived from the NIST SP 811 IT BTU. DESNZ's 2025 Conversions tab gives the consistent derived figure 1 therm = 0.105506 GJ = 29.30711 kWh. The EC therm differs at the ~1e-5 level; v0.1 uses the US therm and labels it.
Definition
- Dimension
- Energy
- Symbols
- therm
- System
- convention
- Base factor
- ×105505585.262
- Exactness
- standard definition
Fixed by a published standard or convention (toe, therm, IT cal/BTU).
Also known as
US thermthermstherm
Sources
Common conversions
for 1 therm| joule | 105,506,000 | J | standard definition |
| kilojoule | 105,506 | kJ | standard definition |
| megajoule | 105.506 | MJ | standard definition |
| gigajoule | 0.105506 | GJ | standard definition |
| kilowatt hour | 29.3071 | kWh | standard definition |
| megawatt hour | 0.0293071 | MWh | standard definition |
| British thermal unit | 100,000 | BTU | standard definition |
| million British thermal units | 0.1 | MMBTU | standard definition |
| tonne of oil equivalent | 0.00251996 | toe | standard definition |